Coenzymes cannot function on their own and do require the presence of an enzyme. Some enzymes require several coenzymes and cofactors. Coenzyme Examples. The B vitamins serve as coenzymes essential for enzymes to form fats, carbohydrates and proteins.
According to the U.S. Food and Drug Administration, unopened commercially bottled water will keep safe indefinitely, as long as the bottles remain properly sealed and arenât damaged. After long-term storage, the bottled waterâs appearance, smell or taste may change somewhat, but the water will still be safe to consume, says the FDA. And while bottled water manufacturers are permitted to put expiration dates on their labels, these dates are meant to be indicators of quality, not safety.
All companies that produce consumables must, by federal law, have an expiration date on it. Since bottled water is a consumable the company must put a expiration date on it. Also some water becomes impure due to plastic melting or substances released into the water by the plastic. There is a chance that over time (years), the container could cause the water to have a different taste.